| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Semiárido. |
|
Data corrente: |
17/12/2013 |
|
Data da última atualização: |
20/12/2013 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
GALVÍNCIO, J. D.; MOURA, M. S. B. de; SILVA, T. G. F. da; SILVA, B. B. da; NAUE, C. R. |
|
Afiliação: |
JOSICLÊDA DOMICIANO GALVÍNCIO; MAGNA SOELMA BESERRA DE MOURA, CPATSA; THIERES GEORGE FREIRE DA SILVA; BERNARDO BARBOSA DA SILVA; CARINE ROSA NAUE. |
|
Título: |
LAI Improved to dry forest in Semiarid of the Brazil. |
|
Ano de publicação: |
2013 |
|
Fonte/Imprenta: |
International Journal of Remote Sensing Applications, v. 3, n. 4, p. 193-202, dec. 2013. |
|
DOI: |
10.14355/ijrsa.2013.0304.04 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Savannas are globally important ecosystems of great significance to human economies. Savannas exist in water-limited regions which forces tree canopies open and heterogeneous. The open canopy structure allows grass to co-dominate in the savannas by occupying different niches in space and time. Leaf area index (LAI) and fraction of photosynthetically active radiation absorbed by vegetation (FPAR) characterize vegetation canopy functioning and energy absorption capacity. LAI and FPAR are key parameters in most ecosystem productivity models and global models of climate, hydrology, biogeochemistry and ecology. Given the above, this study aimed to develop an equation of LAI calibrated by savannah in semiarid northeastern Brazil and proposed a model to better estimate the LAI for dry forest, such as the savanna (Caatinga). The model developed in this study may be used to improve the estimates of Leaf Area Index [LAI] in dry forest with NDVI. One model for savanna-specific of leaf area index (LAI) has been developed. The use of S Curve statistical methods to calibrate the leaf area index (LAI) proved to be an efficient method. The model development gives good results in most of the LAI range known for Caatinga stands in Northeast of Brazil. The Root Mean Square Error (RMSE) calculated on an independent LAI dataset was 0.10, which is about 6% of the average measured LAI. This method offers a simple and operational alternative to application of complex and computationally intensive techniques, and could be used to design other species-specific LAIs. This study reinforces the importance of developing models to better estimate the LAI in different ecosystems since there are no similarities of the LAI between dry and humid climate. MenosSavannas are globally important ecosystems of great significance to human economies. Savannas exist in water-limited regions which forces tree canopies open and heterogeneous. The open canopy structure allows grass to co-dominate in the savannas by occupying different niches in space and time. Leaf area index (LAI) and fraction of photosynthetically active radiation absorbed by vegetation (FPAR) characterize vegetation canopy functioning and energy absorption capacity. LAI and FPAR are key parameters in most ecosystem productivity models and global models of climate, hydrology, biogeochemistry and ecology. Given the above, this study aimed to develop an equation of LAI calibrated by savannah in semiarid northeastern Brazil and proposed a model to better estimate the LAI for dry forest, such as the savanna (Caatinga). The model developed in this study may be used to improve the estimates of Leaf Area Index [LAI] in dry forest with NDVI. One model for savanna-specific of leaf area index (LAI) has been developed. The use of S Curve statistical methods to calibrate the leaf area index (LAI) proved to be an efficient method. The model development gives good results in most of the LAI range known for Caatinga stands in Northeast of Brazil. The Root Mean Square Error (RMSE) calculated on an independent LAI dataset was 0.10, which is about 6% of the average measured LAI. This method offers a simple and operational alternative to application of complex and computationally intensive t... Mostrar Tudo |
|
Palavras-Chave: |
Ecossistemas secos; Fieldspec; LAI; Modelo de desenvolvimento; Natural resource; Savanas. |
|
Thesagro: |
Caatinga; Recurso natural; Sensoriamento remoto. |
|
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/94197/1/Magna-3.pdf
|
|
Marc: |
LEADER 02594naa a2200289 a 4500
001 1974172
005 2013-12-20
008 2013 bl uuuu u00u1 u #d
024 7 $a10.14355/ijrsa.2013.0304.04$2DOI
100 1 $aGALVÍNCIO, J. D.
245 $aLAI Improved to dry forest in Semiarid of the Brazil.$h[electronic resource]
260 $c2013
520 $aSavannas are globally important ecosystems of great significance to human economies. Savannas exist in water-limited regions which forces tree canopies open and heterogeneous. The open canopy structure allows grass to co-dominate in the savannas by occupying different niches in space and time. Leaf area index (LAI) and fraction of photosynthetically active radiation absorbed by vegetation (FPAR) characterize vegetation canopy functioning and energy absorption capacity. LAI and FPAR are key parameters in most ecosystem productivity models and global models of climate, hydrology, biogeochemistry and ecology. Given the above, this study aimed to develop an equation of LAI calibrated by savannah in semiarid northeastern Brazil and proposed a model to better estimate the LAI for dry forest, such as the savanna (Caatinga). The model developed in this study may be used to improve the estimates of Leaf Area Index [LAI] in dry forest with NDVI. One model for savanna-specific of leaf area index (LAI) has been developed. The use of S Curve statistical methods to calibrate the leaf area index (LAI) proved to be an efficient method. The model development gives good results in most of the LAI range known for Caatinga stands in Northeast of Brazil. The Root Mean Square Error (RMSE) calculated on an independent LAI dataset was 0.10, which is about 6% of the average measured LAI. This method offers a simple and operational alternative to application of complex and computationally intensive techniques, and could be used to design other species-specific LAIs. This study reinforces the importance of developing models to better estimate the LAI in different ecosystems since there are no similarities of the LAI between dry and humid climate.
650 $aCaatinga
650 $aRecurso natural
650 $aSensoriamento remoto
653 $aEcossistemas secos
653 $aFieldspec
653 $aLAI
653 $aModelo de desenvolvimento
653 $aNatural resource
653 $aSavanas
700 1 $aMOURA, M. S. B. de
700 1 $aSILVA, T. G. F. da
700 1 $aSILVA, B. B. da
700 1 $aNAUE, C. R.
773 $tInternational Journal of Remote Sensing Applications$gv. 3, n. 4, p. 193-202, dec. 2013.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Semiárido (CPATSA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Florestas. |
|
Data corrente: |
06/01/2011 |
|
Data da última atualização: |
02/06/2017 |
|
Tipo da produção científica: |
Nota Técnica/Nota Científica |
|
Autoria: |
BARBOSA, L. R.; SANTOS, F.; WILCKEN, C. F.; SOLIMAN, E. P. |
|
Afiliação: |
LEONARDO RODRIGUES BARBOSA, CNPF; Franciele Santos, Bolsista da Embrapa Florestas; Carlos F. Wilcken, UNESP; Everton P. Soliman, UNESP. |
|
Título: |
Registro de Thaumastocoris peregrinus (Hemiptera, Thaumastocoridae) no Estado do Paraná. |
|
Ano de publicação: |
2010 |
|
Fonte/Imprenta: |
Pesquisa Florestal Brasileira, Colombo, v. 30, n. 61, p. 75-77, jan./abr. 2010. |
|
DOI: |
10.4336/2010.pfb.30.61.75 |
|
Idioma: |
Português |
|
Notas: |
Nota científica. |
|
Conteúdo: |
É registrada a ocorrência de Thaumastocoris peregrinus Carpintero & Dellapé, 2006 (Hemiptera, Thaumastocoridae) em árvores de eucalipto no Estado do Paraná. Infestações foram observadas, em junho de 2009, na região de Curitiba. |
|
Palavras-Chave: |
Percevejo bronzeado. |
|
Thesagro: |
Praga. |
|
Thesaurus NAL: |
Eucalyptus. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/24910/1/112-318-2-PB.pdf
|
|
Marc: |
LEADER 00906naa a2200217 a 4500
001 1871777
005 2017-06-02
008 2010 bl uuuu u00u1 u #d
024 7 $a10.4336/2010.pfb.30.61.75$2DOI
100 1 $aBARBOSA, L. R.
245 $aRegistro de Thaumastocoris peregrinus (Hemiptera, Thaumastocoridae) no Estado do Paraná.$h[electronic resource]
260 $c2010
500 $aNota científica.
520 $aÉ registrada a ocorrência de Thaumastocoris peregrinus Carpintero & Dellapé, 2006 (Hemiptera, Thaumastocoridae) em árvores de eucalipto no Estado do Paraná. Infestações foram observadas, em junho de 2009, na região de Curitiba.
650 $aEucalyptus
650 $aPraga
653 $aPercevejo bronzeado
700 1 $aSANTOS, F.
700 1 $aWILCKEN, C. F.
700 1 $aSOLIMAN, E. P.
773 $tPesquisa Florestal Brasileira, Colombo$gv. 30, n. 61, p. 75-77, jan./abr. 2010.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Florestas (CNPF) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
